45*45有什么规律-天气预报

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45*45有什么规律

更新时间： 2020-10-31 00:00:00

45*45等等这些相同的带5的两位数相乘，结果结尾都是25，关键是求前面几位数我们除去5（不看5），4乘4再加本身为20，所以45*45结果为2025；再来，看25*25，我们看2乘2再加本身2为6，所以结果为625；再来看35*35，我们看3乘以3再加3为12所以结果为1225；再来看65*65，因为6*6+6=42所以结果为4225，以此类推

关键词：什么规律

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